Javascript Exercise Solutions

PLEASE NOTE Make sure you attempt the exercises before looking at this page!

Is this number bigger than 100

function isBiggerThan100( number ) {
    if (number > 100) {
        return true;
    } else {
        return false;
    }
}

You can also do this with what's called a 'one-liner' inside the function – the entire express as a single line of code. That's because 'number > 100' returns a boolean, so you can just directly return that.

function isBiggerThan100( number ) {
    return number > 100;
}

console.log('99 is greater than 100: ' + isBiggerThan100( 99 ) );
console.log('204 is greater than 100: ' + isBiggerThan100( 204 ) );

What number's bigger

function greaterNum(num1, num2) {
    if (num1 > num2) {
        return num1;
    } else {
        return num2;
    }
}

console.log(greaterNum(5, 10));

The World Translator

function helloWorld(lang) {
    if (lang == 'fr') {
        return 'Bonjour, monde';
    } else if (lang == 'es') {
        return 'Hola, Mundo';
    } else {
        return 'Hello, World';
    }
}

console.log(helloWorld('en'));
console.log(helloWorld('fr'));
console.log(helloWorld('es'));

The Pluralizer

function pluralize(noun, number) {
    if (number === 1){
        return number + ' ' + noun;
    }
    if (noun === 'sheep'){
        return number + ' ' + 'sheep'
    }
    if (noun === 'goose'){
        return number + ' ' + 'geese'
    }
    return number + ' ' + noun + 's';
}
console.log('I have ' + pluralize('cat', 0));
console.log('I have ' + pluralize('cat', 1));
console.log('I have ' + pluralize('goose', 2));
console.log('I have ' + pluralize('dog', 2));